For he grew up before him like a young plant,
and like a root out of dry ground;
he had no form or majesty that we should look at him,
and no beauty that we should desire him.
We know that this passage is referring to the Messiah, to Jesus.
Jesus came into this world in humility. He could have arrived in so many different ways, but He chose to arrive as a baby in a manger. We have glorified that scene, but it would not have been glorious at the time.
He didn't come with anything that would naturally attract us to Him, so that His followers might be true followers of Him.